| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* Machine-dependent pthreads configuration and inline functions. |
| 2 | FR-V version. |
| 3 | Copyright (C) 2004 Free Software Foundation, Inc. |
| 4 | This file is part of the GNU C Library. |
| 5 | Contributed by Alexandre Oliva <aoliva@redhat.com> |
| 6 | |
| 7 | The GNU C Library is free software; you can redistribute it and/or |
| 8 | modify it under the terms of the GNU Lesser General Public License as |
| 9 | published by the Free Software Foundation; either version 2.1 of the |
| 10 | License, or (at your option) any later version. |
| 11 | |
| 12 | The GNU C Library is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | Lesser General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU Lesser General Public |
| 18 | License along with the GNU C Library; see the file COPYING.LIB. If |
| 19 | not, write to the Free Software Foundation, Inc., |
| 20 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #ifndef _PT_MACHINE_H |
| 23 | #define _PT_MACHINE_H 1 |
| 24 | |
| 25 | #include <features.h> |
| 26 | |
| 27 | #ifndef __ASSEMBLER__ |
| 28 | |
| 29 | #ifndef PT_EI |
| 30 | # define PT_EI __extern_always_inline |
| 31 | #endif |
| 32 | |
| 33 | /* Spinlock implementation; required. */ |
| 34 | PT_EI long int |
| 35 | testandset (int *spinlock) |
| 36 | { |
| 37 | int i = 1; |
| 38 | __asm__ ("swap%I0 %M0, %1" : "+m"(*(volatile int *)spinlock), "+r"(i)); |
| 39 | return i; |
| 40 | } |
| 41 | |
| 42 | /* We want the OS to assign stack addresses. */ |
| 43 | #define FLOATING_STACKS 1 |
| 44 | |
| 45 | /* This symbol is defined by the ABI as the stack size requested by |
| 46 | the main program. */ |
| 47 | extern char __stacksize; |
| 48 | #define ARCH_STACK_MAX_SIZE ((unsigned long)&__stacksize) |
| 49 | |
| 50 | /* Memory barrier; default is to do nothing */ |
| 51 | #define MEMORY_BARRIER() __asm__ __volatile__("membar" : : : "memory") |
| 52 | /* Write barrier. */ |
| 53 | #define WRITE_MEMORY_BARRIER() __asm__ __volatile__("membar" : : : "memory") |
| 54 | |
| 55 | /* Return the thread descriptor for the current thread. */ |
| 56 | register struct _pthread_descr_struct *THREAD_SELF __asm__ ("gr29"); |
| 57 | #define THREAD_SELF THREAD_SELF |
| 58 | |
| 59 | /* Initialize the thread-unique value. */ |
| 60 | #define INIT_THREAD_SELF(descr, nr) \ |
| 61 | (THREAD_SELF = descr) |
| 62 | |
| 63 | /* Get some notion of the current stack. Need not be exactly the top |
| 64 | of the stack, just something somewhere in the current frame. */ |
| 65 | #define CURRENT_STACK_FRAME stack_pointer |
| 66 | register char * stack_pointer __asm__ ("sp"); |
| 67 | |
| 68 | #endif |
| 69 | |
| 70 | #endif /* pt-machine.h */ |